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We report a much better drug delivery system(DDS)based on hydroxyapatite nanoparticles(HAp NPs),which can conveniently and effectively achieve to track and control release of anticancer drugs.HAp can act as an excellent DDS,probably due to its exceptional biocompatibility and biodegradability properties.Low solubility in water is an intrinsic property of many drugs,which hinders the clinical applications of those active ingredients.